German tuner Kubatech offers 650 horsepower power kit upgrade for 997 GT2
Squeezing more power of a Porsche turbo motor is pretty normal normal stuff in the 911 world. Kubatech takes a 997 GT2 and modifies the turbos, adds larger intercoolers, new exhaust manifolds with 200 cell cats, and tunes the ECU for the new parts. All this nets you about a 130 horse bump which is not bad. As European tuners often do, no dynograph provided. Oh, and did we mention you get all this for 23,000 Euros? Yes, there are much better tuning options available providing more power for far less money.